As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING PACK TEMPERATURE CONTROL BITE TESTS, FOUND THE LEFT PACK TCV FAULT LOGGED. ACFT GROUNDED. REMOVED AND REPLACED LEFT PACK TEMPERATURE CONTROL VALVE IAW AMM 21-51-10-000-801. PERFORMED BITE TEST IAW AMM 21-61-00-700-806-002. TEST PASSED, LEAK CHECKED GOOD.